AnonD-396766, 18 May 2015tcool be cool am not bashing your device, am just writing what i experienced using this brand,... moreNo need to argue, I've been doing that and no problem with my signals. Zain and STC, both SIM cards are set to GSM only and are working properly even after calls.
Even inside my office I can still get signal coverage with S5 Duos where my previous phones cannot.
Perhaps your phone is defective and this is an isolated case.

Anonymous, 17 May 2015Usually camera failure is caused by 3rd party applications that uses camera. In my case, insta... moreThis is also my problem with the S5. I have this replaced 4 x and did not apply/load viber. So far the camera is okay. Has samsung figured this out since this is a known issue? Ty

Dr R, 18 May 2015reception sensitivity appears a problem but might I ask were you using the 4G network. I have ... moreyou are right about what you said.
and here is what i got
i got two bar signal on both Zain, and Mobily while using 4G.
i got full bar signal on both Zain, and Mobily while using 3G.
i got full bar signal on both Zain, and Mobily while using 2G.

i notice when i made a call from mobily the sound is very low sometimes i hear a very annoying noise, that never happen when i use Zain or Stc.

about the dual sim stand-by that's also true but as i mention earlier when i made a call from Zain sim card, mobily sim card will be inactive during the call and when you finish the call it will be inactive and never reactivated unless phone restared.

tcool be cool am not bashing your device, am just writing what i experienced using this brand, there is no need to say that i am an idiot, and does not know how to use an android phablet, i strongly urges you to use both carriers Zain, and Mobily then make a call from Zain to any Carrier of your choice and see what happens to mobily sim....it will be inactive for a long time you will have to restart the phone to activate it once again, remember that when i did this both sim was in GSM mode.

also you can check this with the service mode window when you call *#0011# do this before you made a call from Zain sim and after and see what happens to mobily sim.

Dr R, 18 May 2015Two problems which caused excessive battery drain. First app collision between torch and camer... more
You are talking about excessive battery drain in your first sentence, you did not mention the network weak/poor signal coverage. It is the number one cause of battery drain. Your problems come only second and third!

AnonD-396766, 18 May 2015here in ksa we have at least three famous GSM carriers as follow STC, Zain, Mobily.
i use t... morereception sensitivity appears a problem but might I ask were you using the 4G network. I have noticed that 3G signal strength can be far higher than 4G and my fluctuate more than the 3G signal. Secondly the phone dual sims: only one can use the 4G at a time the other has to be set at GSM. However you can set the phone so that calls can be received by both sims at the same time however on the data side only one sim can operate at a time on 4G.

AnonD-396766, 18 May 2015here in ksa we have at least three famous GSM carriers as follow STC, Zain, Mobily.
i use t... moreActually it is not the phone problem, it is you who have the problem. You don't know the proper settings to enjoy it to the fullest!

I have mine bought from Extra store and I am not experiencing any of your problems.

s5duos, 17 May 2015You said that i also faced camera failure. Can you confirm what exacly caused that please help... moreTwo problems which caused excessive battery drain. First app collision between torch and camera app resulting in camera being constantly on resulting in non access to camera or torch. Changed torch app to GS6light solved camera and torch collision. Second an indexing app possibly related to Samsung's S-Find runs in the background at beginning especially if you load many apps or add many files to SD card. After several days work it settles down. This effect reduced my initial battery life to less than 6 hours. Now running at 15 hours with battery and ram saving apps in place.

Princz, 13 May 2015The camera failure is because of the instant message apps, like Viber. Myself I experienced th... moreYou said that i also faced camera failure. Can you confirm what exacly caused that please help this it drives me crazy

s5duos, 14 May 2015You said that i also faced camera failure. Can you confirm what exacly caused that please help... moreUsually camera failure is caused by 3rd party applications that uses camera. In my case, installing Viber seems to trigger camera failure.

Princz, 13 May 2015The camera failure is because of the instant message apps, like Viber. Myself I experienced th... moreYou said that i also faced camera failure. Can you confirm what exacly caused that please help this it drives me crazy

Does anyone has camera failled message on s5 duos. Im using my phone 4 months but somethin little before update i started to get this message so since kitkat does anyone knows what can cause this. P.s after restarting the ohone camera worka again normally

AnonD-394744, 13 May 2015thanks for the enlightenment. Shall wait for 5.1 instead of upgrading to 5.0.
Why in a hurry to update? If your phone is still working fine with Kitkat, so what's the excitement in updgrading to Lollipop?

AnonD-394744, 12 May 2015@Tcool.
Brother I have G900fd UAE version and Samsung has pushed lollipop OTA in the last w... moreMy answear is NO. Batery time better with Lolipop. And hereby the "better" chapter stops. 5.0 has serious RAM management problem. That's why I experience "unfortunetly X app has stop" kind of essages on my phone. I didn't noticed heating problems, except when I had the camera failure problem. You can see this in my other post, regarding to this issue.